Electric field calculation system and method for offshore flexible straight valve hall

Abstract

The invention belongs to the technical field of electric power system electromagnetic field simulation, and relates to an electric field calculation system and method for an offshore flexible straight valve hall. Comprising the following steps that valve hall design parameters are obtained, and the design parameters at least comprise an original drawing, space size information and voltage excitation conditions of electrical equipment; based on the original drawing and the spatial size information, establishing a three-dimensional geometric model containing main electrical equipment in the valve hall; importing the three-dimensional geometric model into a finite element analysis environment, defining the material attribute of each part, and applying a boundary condition corresponding to the voltage excitation condition; and grid division is carried out on the model after the boundary condition is applied, electrostatic field solving calculation is carried out, an electric field distribution result of the internal space of the valve hall is obtained, and the electric field distribution result is output. According to the invention, accurate and efficient simulation of electric field distribution in the complex valve hall is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electromagnetic field simulation of power systems, and relates to an electric field calculation system and method for an offshore flexible direct current valve hall. BACKGROUND

[0002] With large-scale development of deep-sea wind power, offshore flexible direct current (flexible direct current) has become a key technical path for long-distance and large-capacity offshore wind power grid connection. In an offshore flexible direct current converter station, the valve hall, as a core electrical equipment integration space, carries complex arrangements such as high-voltage thyristor / IGBT valve towers, voltage-sharing shielding structures, direct current wall bushings, and grounding frames. The internal electric field distribution directly determines the rationality of insulation coordination, the setting of equipment safety spacing, and the level of local discharge risk prevention and control. In existing engineering practices, empirical formula methods (such as parallel plate capacitance model and sphere-plate approximate field strength estimation) or simplified two-dimensional axisymmetric finite element models are often used to carry out electric field estimation, which relies on the experience of designers for correction and is difficult to reflect the electric field distortion caused by three-dimensional space multi-conductor coupling, curved surface shielding effect, and structural details.

[0003] However, the above methods are limited by low geometric modeling accuracy, single boundary condition, extensive grid strategy, and missing result feedback mechanism, and cannot accurately quantify the local electric field strength of key insulation gaps, voltage-sharing cover edges, and valve tower connection areas in the valve hall, leading to conservative device arrangement or hidden breakdown risks, which is difficult to meet the engineering needs of high reliability, compactness, and full life cycle insulation design of offshore flexible direct current valve halls. SUMMARY

[0004] To solve the technical problems of insufficient precision of traditional electric field calculation methods and difficulty in reflecting real electric field distribution under complex three-dimensional structures in the prior art, the application provides an electric field calculation system and method for an offshore flexible direct current valve hall, which realizes accurate and efficient simulation of the internal electric field distribution of a complex valve hall.

[0005] To achieve the above-mentioned purpose, the following technical solutions are adopted: In a first aspect, the application provides an electric field calculation method for an offshore flexible direct current valve hall, comprising the following steps: Obtaining valve hall design parameters, the design parameters at least including original drawings of electrical equipment, spatial size information, and voltage excitation conditions; Based on the original drawings and spatial size information, a three-dimensional geometric model containing main electrical equipment in the valve hall is established; The three-dimensional geometric model is imported into a finite element analysis environment, material properties of each component are defined, and boundary conditions corresponding to the voltage excitation conditions are applied; The model after applying the boundary conditions is meshed, and electrostatic field solving calculation is performed to obtain the electric field distribution results of the internal space of the valve hall, and the electric field distribution results are output.

[0006] Preferably, when establishing a three-dimensional geometric model containing the main electrical equipment in the valve hall, the geometric features of the electrical equipment are simplified, the main geometric features that affect the electric field distribution are retained, and the secondary geometric features that have an impact on the electric field distribution below a preset threshold are removed.

[0007] Preferably, the method for determining the preset threshold is as follows: Perform an initial electric field calculation on the original, unsimplified model; Analyze the initial electric field calculation results to identify and quantify the influence of different geometric features on the local electric field intensity and the overall electric field distribution; The preset threshold is set based on the degree of influence to guide the removal of minor geometric features.

[0008] Preferably, the voltage excitation conditions include a variety of preset typical operating voltages and overvoltage waveforms.

[0009] Preferably, in the step of importing the three-dimensional geometric model into the finite element analysis environment, the model and parameter data between the three-dimensional modeling software and the finite element analysis software are exchanged and updated in real time through an application programming interface.

[0010] Preferably, the electrostatic field solution calculation is performed using a parametric analysis method, including: At least one design parameter is set as a variable parameter, the variable parameter including model parameters and / or excitation parameters; The variable parameters are iterated over within a preset range, and an electrostatic field calculation is performed once for each set of parameter values, thereby obtaining multiple sets of electric field distribution results corresponding to multiple sets of design parameters.

[0011] Preferably, the method for meshing the model after applying boundary conditions includes: Based on the function of each component and its electric field distribution characteristics in the three-dimensional geometric model of the valve hall, the model is divided into critical and non-critical regions. For the critical area, a high-density grid division strategy is adopted. The critical area includes at least the pressure equalization shielding structure surface inside and around the valve tower, the insulation gap area between conductors with different potentials, and the electric field concentration area. For the non-critical areas, a low-density grid partitioning strategy is adopted. The non-critical areas include valve hall walls and spaces away from high-pressure equipment.

[0012] Preferably, the output of the electric field distribution result includes: Generate a three-dimensional electric field intensity distribution cloud map and / or equipotential surface map inside the valve hall; Generate electric field intensity variation curves along a preset critical path; The regions in the electric field distribution results that exceed the preset safety threshold will be highlighted and given a warning.

[0013] Preferably, after outputting the electric field distribution result, the method further includes: The calculated electric field distribution results are compared and analyzed with the preset insulation safety standards. Based on the comparative analysis results, spatial locations in the three-dimensional geometric model of the valve hall where the electric field strength exceeds the standard or where there is an insulation risk are identified. Based on the identified risk locations, optimization suggestions are generated for the three-dimensional geometric model of the valve hall.

[0014] Secondly, the present invention provides an electric field system for a marine flexible direct current valve hall, comprising: Parameter collection module: used to acquire valve hall design parameters, which include at least the original drawings of electrical equipment, spatial dimension information, and voltage excitation conditions; 3D modeling module: used to create a 3D geometric model containing the main electrical equipment in the valve hall based on the original drawings and spatial dimension information; Finite element analysis module: used to import the three-dimensional geometric model into the finite element analysis environment, define the material properties of each component, and apply boundary conditions corresponding to the voltage excitation conditions; Electric field calculation module: used to mesh the model after applying boundary conditions, and to perform electrostatic field calculation to obtain the electric field distribution results of the internal space of the valve hall, and output the electric field distribution results.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention lays a high-fidelity physical foundation for accurate simulation by constructing a three-dimensional geometric model based on the original drawings and dimensional information. Subsequently, material properties are defined and voltage excitation boundary conditions are applied in the finite element analysis environment to ensure the physical realism of the calculation. Through professional mesh generation and electrostatic field solving, the precise electric field distribution inside the valve hall is finally obtained and output. This systematically solves the technical challenge of accurately simulating complex three-dimensional electric field distributions using traditional empirical formulas or simplified two-dimensional models, significantly improving computational accuracy and the reliability of engineering applications. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings: The first objective of this invention is to provide a method for calculating the electric field in a marine flexible direct current valve hall, such as... Figure 1 As shown, it includes the following steps: Obtain valve hall design parameters, which include at least the original drawings of electrical equipment, spatial dimension information, and voltage excitation conditions; Based on the original drawings and spatial dimension information, a three-dimensional geometric model containing the main electrical equipment in the valve hall was established. Import the three-dimensional geometric model into the finite element analysis environment, define the material properties of each component, and apply boundary conditions corresponding to the voltage excitation conditions; The model after applying boundary conditions is meshed, and the electrostatic field is calculated to obtain the electric field distribution results of the internal space of the valve hall, and the electric field distribution results are output.

[0025] This invention acquires valve hall design parameters (including original drawings, spatial dimensions, and voltage excitation conditions), constructs a high-fidelity three-dimensional geometric model, and imports it into a finite element analysis environment to define material properties and boundary conditions. It then performs adaptive mesh generation and electrostatic field solution, overcoming the shortcomings of traditional empirical formulas or simplified models that cannot reproduce the electric field distortion of complex three-dimensional structures. Therefore, it can accurately obtain the electric field distribution inside the valve hall, significantly improving the scientific nature of insulation design and the safety of equipment layout. It is particularly suitable for critical scenarios such as offshore flexible valve halls, which are characterized by dense structures, harsh operating conditions, and limited operation and maintenance.

[0026] Specifically, this invention obtains original drawings, spatial dimensions, and various voltage excitation conditions covering all operating conditions, solving the problem of model distortion caused by one-sided input parameters in traditional methods. By constructing a three-dimensional geometric model containing major electrical equipment based on drawings, it overcomes the deficiency of simplified two-dimensional models in failing to reflect three-dimensional spatial electric field distortion. By importing the model into a finite element environment and accurately defining material properties and boundary conditions, it avoids the limitations of empirical formulas that ignore medium inhomogeneity and boundary non-ideals. By implementing regional adaptive mesh generation and performing electrostatic field solving, it ensures sub-millimeter-level electric field analysis capability at key insulation weak points. Therefore, this invention fundamentally improves the accuracy, robustness, and engineering applicability of electric field calculations for offshore flexible DC valve halls, providing quantifiable technical basis for compact valve hall equipment layout, refined design of voltage equalization structures, overvoltage protection strategy formulation, and insulation coordination verification, significantly reducing the risk of insulation failure and operation and maintenance costs of offshore converter stations caused by electric field anomalies.

[0027] For example, when establishing a three-dimensional geometric model containing the main electrical equipment in the valve hall, the geometric features of the electrical equipment are simplified, the main geometric features that affect the electric field distribution are retained, and the secondary geometric features that have an impact on the electric field distribution below a preset threshold are removed.

[0028] Geometric feature simplification refers to the selective neglect or equivalent processing of local fine structures that do not affect the accuracy of electrostatic field spatial distribution calculations during the construction of a 3D geometric model based on the original CAD drawings. This simplification operation does not involve a general abstraction of the overall shape and functional outline of the equipment, but focuses on suppressing detailed features that have no substantial impact on electrostatic field analysis. This processing belongs to the simulation preprocessing stage. By reasonably simplifying geometric features during the modeling stage, the model complexity can be effectively reduced while ensuring the physical accuracy of the electric field simulation results. This reduces the number of elements in subsequent mesh generation, thereby improving mesh generation efficiency and enhancing the convergence of the numerical solution process.

[0029] This step achieves the technical effect of systematically reducing the complexity of 3D modeling and computational resource consumption of offshore flexible valve halls without sacrificing the accuracy of electric field simulation engineering. Because the electrical equipment is subjected to hierarchical processing of geometric features based on the quantification of electric field influence, it avoids the risk of misjudgment of insulation margin caused by oversimplification (such as missing the electric field superposition effect at the gap of the equalizing ring), and overcomes the problems of mesh ill-conditioning, solution divergence and iteration timeout caused by directly importing the original CAD model. This supports high-frequency parametric scanning and rapid comparison of multiple operating conditions, providing a reliable simulation basis for the compact layout and lightweight shielding design of valve halls in the confined space of offshore platforms.

[0030] For example, the method for determining the preset threshold is as follows: Perform an initial electric field calculation on the original, unsimplified model; Analyze the initial electric field calculation results to identify and quantify the influence of different geometric features on the local electric field intensity and the overall electric field distribution; The preset threshold is set based on the degree of influence to guide the removal of minor geometric features.

[0031] The original model without simplification refers to a three-dimensional geometric model constructed entirely based on the original drawings (including all CAD layer information) and spatial dimension information of the electrical equipment without any geometric simplification. It includes all visible geometric details such as the valve tower body, equalizing ring, shielding cover, insulator flange, bolt hole group, heat dissipation fins, chamfers, small welds, and non-functional ventilation holes.

[0032] This invention avoids modeling bias caused by subjective deletions based on engineer experience in traditional methods by employing full electric field inversion of the original model and multi-dimensional sensitivity quantification analysis. Secondly, the threshold setting is deeply coupled with the actual voltage excitation type, material parameters, and standard limits, enabling the simplified model to accurately support engineering decisions such as insulation coordination verification, shielding structure optimization, and overvoltage protection design. This solves the problems of unreliable electric field simulation results, uncontrollable modeling process, and low design iteration efficiency caused by the lack of objective basis in the prior art due to geometric simplification, and significantly improves the scientificity, standardization, and engineering applicability of electric field analysis in offshore flexible direct current valve halls.

[0033] For example, the voltage excitation conditions include various preset typical operating voltages and overvoltage waveforms. Typical operating voltages are used to verify long-term insulation reliability under normal operating conditions, preventing corona aging and space charge accumulation; overvoltage waveforms focus on identifying breakdown risks under short-term extreme stress, paying particular attention to whether the instantaneous field strength in areas of concentrated electric field, such as air gap edges, shield openings, and insulator skirt gaps, exceeds the air breakdown threshold. This invention, by introducing multiple types and multi-parameterized overvoltage waveforms, solves the technical problem of missed detection of weak points in insulation caused by relying solely on a single rated DC voltage in traditional methods, thereby significantly improving the adaptability and predictive accuracy of electric field assessment results to the complex electromagnetic conditions of real marine environments.

[0034] For example, in the step of importing the three-dimensional geometric model into the finite element analysis environment, a programming interface (API) is used to achieve real-time exchange and synchronous updating of model and parameter data between the three-dimensional modeling software and the finite element analysis software. This design effectively solves the problems of geometric distortion, information loss, or data asynchrony that may be caused by model conversion in traditional processes. It ensures data consistency from design to simulation, allowing modifications to model parameters to be immediately reflected in subsequent simulation calculations, significantly improving the collaborative efficiency and iterative optimization speed of electric field calculations, and shortening the design and analysis cycle of the valve hall.

[0035] For example, the electrostatic field solution calculation is performed in a parametric analysis manner, including: At least one design parameter is set as a variable parameter, the variable parameter including model parameters and / or excitation parameters; The variable parameters are iterated over within a preset range, and an electrostatic field calculation is performed once for each set of parameter values, thereby obtaining multiple sets of electric field distribution results corresponding to multiple sets of design parameters.

[0036] This invention solves the technical problem that traditional single-point simulation cannot support multi-condition design decisions by setting model parameters and excitation parameters as variable variables and traversing them within the engineering feasible region. By independently performing a complete electrostatic field solution for each set of parameters, it ensures the physical independence and accuracy consistency of multiple sets of electric field distribution results. Furthermore, based on the obtained parameter-electric field mapping database, it can quickly identify the sensitivity ranking of electric field intensity to specific parameters, locate key design bottlenecks, generate structural optimization suggestions, and ultimately support the coordinated optimization of valve hall equipment layout, shielding structure size, and overvoltage protection level, significantly improving the level of design intelligence and engineering reliability.

[0037] For example, the method for meshing the model after applying boundary conditions includes: Based on the function of each component and its electric field distribution characteristics in the three-dimensional geometric model of the valve hall, the model is divided into critical and non-critical regions. For the critical area, a high-density grid division strategy is adopted. The critical area includes at least the pressure equalization shielding structure surface inside and around the valve tower, the insulation gap area between conductors with different potentials, and the electric field concentration area. For the non-critical areas, a low-density grid partitioning strategy is adopted. The non-critical areas include valve hall walls and spaces away from high-pressure equipment.

[0038] This invention divides the three-dimensional geometric model of the valve hall into critical and non-critical regions based on the function and electric field characteristics of each component, and employs differentiated mesh generation strategies of high density and low density for each region. This method significantly improves the quality and efficiency of finite element mesh generation. It enables highly accurate and detailed capture of critical regions such as the valve tower perimeter, insulation gaps, and areas with concentrated electric fields, ensuring the accuracy of electric field strength and gradient calculations. Simultaneously, it avoids unnecessary over-meshing of non-critical regions such as walls and areas far from equipment. Thus, while maintaining computational accuracy, it significantly reduces the overall mesh size, effectively saving computational resources and improving simulation speed.

[0039] For example, the output of the electric field distribution result includes: Generate a three-dimensional electric field intensity distribution cloud map and / or equipotential surface map inside the valve hall; Generate electric field intensity variation curves along a preset critical path; The regions in the electric field distribution results that exceed the preset safety threshold will be highlighted and given a warning.

[0040] Among them, cloud maps and equipotential surface maps provide global spatial distribution situation awareness and reveal the macroscopic laws of electric field distortion; critical path curves focus on the quantitative trends of local sensitive areas, supporting insulation distance verification and shielding effectiveness assessment; highlighting marks and early warning prompts establish a closed-loop mapping of "numerical value - risk - decision", transforming abstract field quantities into executable engineering criteria.

[0041] For example, after outputting the electric field distribution result, the method further includes: The calculated electric field distribution results are compared and analyzed with the preset insulation safety standards. Based on the comparative analysis results, spatial locations in the three-dimensional geometric model of the valve hall where the electric field strength exceeds the standard or where there is an insulation risk are identified. Based on the identified risk locations, optimization suggestions are generated for the three-dimensional geometric model of the valve hall.

[0042] This method enables automatic safety verification of simulation results, accurately locates areas with excessive electric fields or weak insulation, and directly proposes specific and actionable model optimization suggestions. It effectively shortens the cycle of manual judgment and repeated trial and error from problem analysis to improvement plan formulation, significantly improves the reliability verification efficiency and intelligent level of optimization iteration of valve hall electric field design, and forms a closed loop from calculation to optimization design.

[0043] A second objective of this invention is to provide an electric field system for a marine flexible direct current valve hall, comprising: Parameter collection module: used to acquire valve hall design parameters, which include at least the original drawings of electrical equipment, spatial dimension information, and voltage excitation conditions; 3D modeling module: used to create a 3D geometric model containing the main electrical equipment in the valve hall based on the original drawings and spatial dimension information; Finite element analysis module: used to import the three-dimensional geometric model into the finite element analysis environment, define the material properties of each component, and apply boundary conditions corresponding to the voltage excitation conditions; Electric field calculation module: used to mesh the model after applying boundary conditions, and to perform electrostatic field calculation to obtain the electric field distribution results of the internal space of the valve hall, and output the electric field distribution results.

[0044] This invention transforms the electric field calculation process for offshore flexible vertical valve halls from a traditional, complex process reliant on manual experience and fragmented tools into a standardized, automated, and highly collaborative systems engineering approach by constructing an integrated system comprising four functional modules: parameter collection, 3D modeling, finite element analysis, and electric field calculation. Secondly, the system achieves cross-platform collaboration through standardized data interfaces, supporting stable deployment across different hardware configurations and software ecosystems. This meets both the rapid response requirements of engineering sites and the high-precision reproduction requirements of research institutions. The system significantly improves the consistency between electric field simulation results and actual physical fields; shortens the evaluation cycle of a single scheme to the hour level; ensures the comparability and auditability of analysis processes across multiple projects; and reserves standardized expansion interfaces for subsequent coupled thermal field, mechanical stress, or multi-physics field co-simulation.

[0045] In one embodiment of the present invention, a computer device is provided, comprising a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions from the computer storage medium to achieve a corresponding method flow or corresponding function. The processor described in this embodiment of the present invention can be used for the operation of the electric field method in a marine flexible direct current valve hall.

[0046] This invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the operating system of the terminal. Furthermore, the storage space also stores one or more instructions suitable for loading and execution by a processor, which can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the electric field method for offshore flexible direct current valve halls in the above embodiments.

[0047] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0048] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0049] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes.

[0050] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A method for calculating the electric field in a marine flexible direct current valve hall, characterized in that, Includes the following steps: Obtain valve hall design parameters, which include at least the original drawings of electrical equipment, spatial dimension information, and voltage excitation conditions; Based on the original drawings and spatial dimension information, a three-dimensional geometric model containing the main electrical equipment in the valve hall was established. Import the three-dimensional geometric model into the finite element analysis environment, define the material properties of each component, and apply boundary conditions corresponding to the voltage excitation conditions; The model after applying boundary conditions is meshed, and the electrostatic field is calculated to obtain the electric field distribution results of the internal space of the valve hall, and the electric field distribution results are output.

2. The electric field method for a flexible vertical valve hall at sea according to claim 1, characterized in that, When establishing a three-dimensional geometric model containing the main electrical equipment in the valve hall, the geometric features of the electrical equipment are simplified, the main geometric features that affect the electric field distribution are retained, and the secondary geometric features that have an impact on the electric field distribution below a preset threshold are removed.

3. The electric field method for a flexible vertical valve hall at sea according to claim 2, characterized in that, The method for determining the preset threshold is as follows: Perform an initial electric field calculation on the original, unsimplified model; Analyze the initial electric field calculation results to identify and quantify the influence of different geometric features on the local electric field intensity and the overall electric field distribution; The preset threshold is set based on the degree of influence to guide the removal of minor geometric features.

4. The electric field method for a flexible vertical valve hall at sea according to claim 1, characterized in that, The voltage excitation conditions include a variety of preset typical operating voltages and overvoltage waveforms.

5. The electric field method for a flexible vertical valve hall at sea according to claim 1, characterized in that, In the step of importing the three-dimensional geometric model into the finite element analysis environment, the model and parameter data are exchanged and updated in real time between the three-dimensional modeling software and the finite element analysis software through the application programming interface.

6. The electric field method for a flexible vertical valve hall at sea according to claim 1, characterized in that, The electrostatic field solution is performed using a parametric analysis method, including: At least one design parameter is set as a variable parameter, the variable parameter including model parameters and / or excitation parameters; The variable parameters are iterated over within a preset range, and an electrostatic field calculation is performed once for each set of parameter values, thereby obtaining multiple sets of electric field distribution results corresponding to multiple sets of design parameters.

7. The electric field method for a flexible vertical valve hall at sea according to claim 1, characterized in that, The method for meshing the model after applying boundary conditions includes: Based on the function of each component and its electric field distribution characteristics in the three-dimensional geometric model of the valve hall, the model is divided into critical and non-critical regions. For the critical area, a high-density grid division strategy is adopted. The critical area includes at least the pressure equalization shielding structure surface inside and around the valve tower, the insulation gap area between conductors with different potentials, and the electric field concentration area. For the non-critical areas, a low-density grid partitioning strategy is adopted. The non-critical areas include valve hall walls and spaces away from high-pressure equipment.

8. The electric field method for a flexible vertical valve hall at sea according to claim 1, characterized in that, The output of the electric field distribution result includes: Generate a three-dimensional electric field intensity distribution cloud map and / or equipotential surface map inside the valve hall; Generate electric field intensity variation curves along a preset critical path; The regions in the electric field distribution results that exceed the preset safety threshold will be highlighted and given a warning.

9. The electric field method for a flexible vertical valve hall at sea according to claim 1, characterized in that, After outputting the electric field distribution result, the method further includes: The calculated electric field distribution results are compared and analyzed with the preset insulation safety standards. Based on the comparative analysis results, spatial locations in the three-dimensional geometric model of the valve hall where the electric field strength exceeds the standard or where there is an insulation risk are identified. Based on the identified risk locations, optimization suggestions are generated for the three-dimensional geometric model of the valve hall.

10. An electric field system for a marine flexible direct current valve hall, characterized in that, include: Parameter collection module: used to acquire valve hall design parameters, which include at least the original drawings of electrical equipment, spatial dimension information, and voltage excitation conditions; 3D modeling module: used to create a 3D geometric model containing the main electrical equipment in the valve hall based on the original drawings and spatial dimension information; Finite element analysis module: used to import the three-dimensional geometric model into the finite element analysis environment, define the material properties of each component, and apply boundary conditions corresponding to the voltage excitation conditions; Electric field calculation module: This module is used to mesh the model after applying boundary conditions, perform electrostatic field calculations, obtain the electric field distribution results of the internal space of the valve hall, and output the electric field distribution results.

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